News & Promotion

Thailand’s DEDE Studied 2,500+ Homes to Develop Residential Energy-Efficiency Criteria

 

Thailand’s Department of Alternative Energy Development and Efficiency (DEDE) states that it surveyed energy use in more than 2,500 sample homes nationwide to support the development of energy-efficient home standards in Thailand. The programme is intended to promote residential energy-performance criteria and encourage design and construction practices that combine technology with architectural and engineering principles.

 

This report summarises information published by DEDE. It does not state that every private home is already subject to one mandatory residential code, nor does it imply that any single product automatically guarantees a reduction in energy use.

 

What DEDE publishes about the programme

 

DEDE’s residential energy-performance project page states that Thailand has approximately 27 million homes and that the residential sector accounts for 13.3% of total national energy use. It says the study analysed energy use from more than 2,500 sample homes and developed residential efficiency criteria that could be advanced into a future Energy Code for housing.

 

The published objectives include making residential energy-performance standards better known, encouraging design and construction professionals to combine innovation with professional practice, supporting long-term standards for energy-efficient housing, and preparing for possible future implementation of residential criteria.

 

The stated audience includes the full housing supply chain

 

DEDE identifies the public, relevant government bodies, property and home-building businesses, construction-material manufacturers and suppliers, architects and engineers as target groups. Residential energy performance therefore involves more than the final homeowner. It requires information and decisions to pass between the client, designer, system engineer, product supplier, builder and eventual occupant.

 

DEDE’s residential resources extend beyond appliances

 

DEDE’s residential-sector knowledge centre lists material on landscaping around buildings, automatic building controls, efficient air-conditioning, energy-efficient lighting and appliances, solar energy, the sun’s path and building design, wall performance and the overall design of energy-efficient buildings.

 

These subjects show the range of issues within residential energy planning: the site and landscape, the building envelope, daylight, cooling systems, controls and renewable energy. The performance of a whole home should not be inferred from one insulation product, one air-conditioner or one solar installation.

 

Design criteria and actual operation must be connected

 

Drawings, specifications and calculations describe the planned project. Actual energy use also depends on occupancy, schedules, temperature settings, how openings are operated, equipment maintenance and weather. Comparisons should therefore state the target, assumptions, calculation method and responsibilities rather than relying on an undefined claim of “energy saving”.

 

Information Chiang Mai and Lamphun homeowners can prepare

 

For a new home in Chiang Mai or Lamphun, DEDE’s published subject areas can be used to structure an early design discussion before selecting products. Useful inputs include household size, room-use schedules, cooling expectations, site orientation and shade, opening strategy, proposed roof and wall assemblies, maintenance access, investment limits and the operating costs the household wants to assess.

 

Equipment selection should follow coordinated drawings, documented needs, manufacturer information and actual installation conditions. If an energy-performance target is important, the project should define how it will be calculated or tested, who is responsible for the inputs, and which assumptions apply. Marketing language is not a substitute for project evidence.

 

Frequently asked questions

 

Does this mean every new Thai home is already certified?

No. DEDE’s project page describes study, promotion and preparation for future residential criteria. Any certification or legal requirement must be checked against the rules and process that actually apply to the particular building and project.

 

Does adding solar make a home energy efficient?

That conclusion cannot be made from one system. Demand, envelope design, equipment efficiency, controls, occupancy, system sizing, installation and maintenance must be considered together.

 

Can Greenery guarantee a specific electricity-bill reduction?

A figure should not be guaranteed without approved drawings, calculations, equipment data, operating assumptions and an agreed measurement method. Actual bills also depend on behaviour, weather and electricity tariffs.

 

Where should an energy-efficient home plan begin?

Begin with the land, room-use patterns, household size, comfort objectives and budget framework. Architectural, structural and building-services information can then be coordinated to compare realistic options.

 

Related pages and consultation

 

Explore house concepts, review completed work, learn about Greenery’s approach, or book an initial architect consultation for a Chiang Mai or Lamphun project. The initial consultation does not include a free site survey, soil test, drawings, house design or BOQ.

 

Sources

• Energy Efficiency Promotion Division, Department of Alternative Energy Development and Efficiency, Residential Energy Performance Standards Promotion Project, accessed 26 August 2026.
• Human Resource Development Division, DEDE, Residential-sector energy knowledge resources, accessed 26 August 2026.